A self-propelled cable crane

Abstract

This invention discloses a load-bearing self-propelled cable-mounted crane, comprising a lightweight track and a traveling device. The lightweight track includes several segmented track sections and several flexible cable clamps, with the segmented track sections positioned directly above the main cable of the suspension bridge. The flexible cable clamps are used to fix the segmented track sections to the main cable. The traveling device is located above the segmented track sections and can travel along them. This invention achieves lightweight cable-mounted crane track, facilitating high-altitude assembly and installation, while enabling the cable-mounted crane to travel under load without being affected by the cable clamps and without damaging the main cable.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology. More specifically, this invention relates to a load-bearing self-propelled cable-stayed crane. Background Technology

[0002] Suspension bridges are the preferred bridge type for extra-large and super-large span bridges. For large-span suspension bridges spanning major rivers, lakes, and seas, where ship-borne beam transport is available to varying degrees within the main span, cable-stayed cranes or cable-stayed cranes are often used to vertically lift the main beams from a fixed point on a ship for installation. Alternatively, bridge deck cranes are used to assemble the main beams from the bridge towers towards the mid-span, or floating cranes are used to lift entire sections. For large-span suspension bridges spanning canyons or deep valleys in mountainous areas where water transport is unavailable, cable-stayed cranes are often used to lift pre-assembled main beam sections from both banks and move them longitudinally to install the main beams. Other methods include using bridge deck cranes to assemble the main beam members one by one from the bridge towers towards the mid-span, or using longitudinal cable-stayed systems on gantry cranes to move the main beam sections longitudinally and then vertically lifting them from a fixed point using cable-stayed cranes.

[0003] Cable-mounted cranes are one of the main pieces of equipment used in the construction of main beams for suspension bridges. During construction, the main beams are first transported by ship to the area directly below the cable-mounted crane, and then lifted vertically. For large-span suspension bridges in mountainous areas that cross canyons or deep valleys, where there is no waterway transportation, cable-mounted cranes can be used to vertically lift the assembled main beam segments on both banks and then move them longitudinally to the predetermined position to install the main beams. At this time, the cable-mounted cranes need to move under load, and the following technical difficulties need to be overcome: (1) having sufficient load-bearing capacity, generally 100t-300t; (2) not damaging the main cable during movement; (3) being able to cross cable clamps under load; and (4) having a certain walking speed. Currently, the main working state of conventional cable-mounted cranes is lifting when stationary and moving along the cable when unloaded, so they are not suitable for use conditions that require moving under load. Summary of the Invention

[0004] The purpose of this invention is to provide a load-bearing self-propelled cable crane that achieves lightweight cable crane tracks, facilitates high-altitude assembly and installation, and enables the cable crane to travel with a load without being affected by cable clamps during the travel process, and without damaging the main cable.

[0005] The technical solution adopted by the present invention to solve this technical problem is: a load-bearing self-propelled cable crane, including a lightweight track and a traveling device;

[0006] The lightweight track includes several track segments and several flexible cable clamps. The track segments are laid directly above the main cable of the suspension bridge; the flexible cable clamps are used to fix the track segments to the main cable.

[0007] The walking device is located above the segmented track and can move along the segmented track.

[0008] Preferably, adjacent track segments are connected and extended by hinges using pins.

[0009] Preferably, the flexible cable clamp includes a saddle and a tightening fiber rope;

[0010] The upper end of the saddle is provided with a slot for placing and fixing the section of track along its length. The tightened fiber rope is wrapped around the main cable to tightly limit and fix the saddle to the main cable. The two ends of the tightened fiber rope are fixed to the saddle.

[0011] Preferably, the traveling device includes a traveling frame, a roller assembly, and a connecting shaft connecting the traveling frame and the roller assembly; the roller assembly can rotate relative to the traveling frame around the connecting shaft.

[0012] Preferably, when there are multiple roller groups, the roller groups are hinged together by connecting rods.

[0013] Preferably, the traveling device is provided with load power cylinders at both ends, the load power cylinders include cylinders and electric rail clamps; the cylinders are arranged above the track, one end is hinged to the traveling frame, and the other end is fixed to the segment track through the rail clamps.

[0014] Preferably, the flexible cable clamps are arranged at equal intervals along the entire length of the main cable, and flexible cable clamps are provided at the joints of two track segments.

[0015] Preferably, the traveling frame is provided with a traction connection point.

[0016] Preferably, it also includes a lubrication device, which consists of a flexible groove and an oil outlet device; the flexible groove is detachably installed at the bottom of the tightening fiber rope, and its curvature is consistent with the curvature of the tightening fiber rope, and the lower ends of the flexible groove are sealed.

[0017] The oil dispensing device includes a sponge that absorbs lubricating oil and an oil dispensing power component; a through hole is provided on the saddle, and the sponge is installed in the through hole; the oil dispensing power component includes a base, a pressing linkage rod, and an electric push rod. The base is fixed on the saddle, and the pressing linkage rod is fixed circumferentially by the base. The pressing linkage rod can move up and down, and the bottom shape of the pressing linkage rod is the same as the top shape of the sponge; an electric push rod is installed on the traveling frame. When the traveling frame moves onto the pressing linkage rod, the electric push rod can push the pressing linkage rod downward.

[0018] The present invention has at least the following beneficial effects:

[0019] 1. The track of this invention is made of lightweight materials, and the weight of each segment is strictly controlled to facilitate splicing and transfer during high-altitude operations.

[0020] 2. The flexible cable clamp of the present invention uses fiber rope to fix the saddle to the main cable. The fiber rope is lightweight, high-strength, reliable, and easy to install.

[0021] 3. The cable-mounted crane of this invention has two power systems: when traveling under load, it is driven by a hydraulic cylinder, and when traveling without load, it is pulled by a winch; thus, it can achieve heavy-load travel and improve the efficiency of traveling without load.

[0022] 4. The cable-mounted crane of the present invention uses the traveling cylinders on both sides of the fixed track to drive the cable-mounted crane to move, so as to realize the rapid movement and positioning of the cable-mounted crane at any position of the main cable.

[0023] 5. The top surface of the saddle of the present invention is in perfect alignment with the top surface of the main cable clamp, ensuring that the segmental track can smoothly cross the main cable clamp. It is installed along the entire length and does not affect the permanent structure of the main cable of the suspension bridge.

[0024] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0025] Figure 1 This is a schematic elevation view of a self-propelled cable-mounted crane.

[0026] Figure 2 This is a schematic diagram of the cross-section of a light rail track.

[0027] Figure 3 This is a schematic diagram of the walking device;

[0028] Figure 4 This is a schematic diagram of a walking device according to another embodiment;

[0029] Figure 5 This is a schematic diagram of a lightweight track cross-section according to another embodiment;

[0030] Figure 6 This is a schematic diagram of a walking device according to another embodiment;

[0031] Figure 7 This is a 3D view of a self-propelled cable crane.

[0032] Explanation of reference numerals in the attached drawings: 1. Segmented track; 2. Flexible cable clamp; 2-1. Saddle; 2-2. Tightening fiber rope; 3. Traveling device; 3-1. Traveling frame; 3-2. Roller assembly; 3-3. Connecting shaft; 3-4. Traction connection point; 4. Load power cylinder; 4-1. Cylinder; 4-2. Electric rail clamp; 5-1. Flexible groove; 5-2. Sponge; 5-3. Base; 5-4. Extrusion linkage rod; 5-5. Electric push rod; 6. Cable-driven crane main beam; 7. Main cable. Detailed Implementation

[0033] The present invention will now be described in detail and completely with reference to the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention with reference to the accompanying drawings, it should be particularly noted that the technical solutions and features provided in various parts of the present invention, including the following description, can be combined with each other without conflict.

[0034] Furthermore, the embodiments of the present invention described below are generally only some, not all, of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The specific implementation process is as follows:

[0036] like Figures 1-3 , Figure 7 As shown, the present invention provides a load-bearing self-propelled cable crane, including a lightweight track and a traveling device 3;

[0037] The lightweight track includes several segmented track 1s and several flexible cable clamps 2s. The segmented track 1s are laid directly above the main cable 7 of the suspension bridge and are made of lightweight and high-strength materials. The flexible cable clamps 2 are used to fix the segmented track 1s to the main cable 7.

[0038] The walking device 3 is located above the segmented track 1 and can walk along the segmented track 1.

[0039] In this embodiment, it is preferred that the length and weight of a single segment of track 1 does not exceed 80 kg, so as to facilitate handling and transfer during high-altitude operations on the catwalk. The load-bearing self-propelled cable crane also includes a cable crane main beam 6, which connects the traveling devices 3 on the two main cables 7 into a whole.

[0040] In another embodiment, adjacent track segments 1 are hinged together by pins to extend them.

[0041] In another embodiment, the flexible cable clamp 2 includes a saddle 2-1 and a tightening fiber rope 2-2; the tightening fiber rope 2-2 is preferably a high-strength fiber rope.

[0042] The saddle 2-1 has an irregular shape with a slot at the upper end for placing and fixing the segmental track 1 along its entire length. In this embodiment, the track is similar to an I-beam structure, with both its upper and lower ends protruding horizontally from its center. After the track is placed in the slot, a limiting plate restricts the track's height position. The limiting plate is fixed to the saddle 2-1 with bolts. The tightening fiber rope 2-2 passes around the main cable 7, tightly limiting and fixing the saddle 2-1 to the main cable 7. Both ends of the tightening fiber rope 2-2 are fixed to the saddle 2-1. The segmental track 1 is fixed to the track saddle 2-1 by a pressure plate. The lower part of the track saddle 2-1 has an arc-shaped structure with an arc consistent with the main cable 7 of the suspension bridge, and the tightening fiber rope 2-2 fixes the saddle 2-1 to the main cable 7 of the suspension bridge.

[0043] In another embodiment, the traveling device 3 includes a traveling frame 3-1, a roller assembly 3-2, and a connecting shaft 3-3 connecting the traveling frame 3-1 and the roller assembly 3-2; the roller assembly 3-2 is rotatable relative to the traveling frame 3-1 around the connecting shaft 3-3. The roller assembly 3-2 can consist of one or more sets, and the roller assembly 3-2 is capable of rotating around the connecting shaft 3-3 to adapt to the curvature of the main cable 7 and the spatial alignment changes of the main cable 7 after the cable-borne crane lifts the beam.

[0044] like Figure 4 As shown, in another embodiment, when there are multiple roller groups 3-2, the roller groups 3-2 are hinged together by connecting rods, so that the roller groups 3-2 can rotate together along the connecting shaft 3-3 to adapt to the curved track set along the main cable 7.

[0045] In another embodiment, load-bearing power cylinders 4 are provided at both ends of the traveling device 3. Each load-bearing power cylinder 4 includes a cylinder 4-1 and an electric rail clamp 4-2, providing pushing and pulling force for the cable-mounted crane when it is loaded, thus enabling the cable-mounted crane to travel under load. The load-bearing power cylinders 4 and the traveling device 3 on the two main cables 7 of the suspension bridge are controlled by a control system, ensuring that the traveling mechanisms on both sides of the cable-mounted crane, mounted on the main cables 7, travel synchronously and receive uniform and coordinated force. The cylinder 4-1 is positioned above the track, with one end hinged to the traveling frame 3-1 and the other end fixed to the segmental track 1 via the rail clamp.

[0046] In another embodiment, the flexible cable clamps 2 are arranged at equal intervals along the entire length of the main cable 7, and flexible cable clamps 2 are provided at the splicing positions of two segment rails 1 to ensure the smoothness of the rail at the splicing point. When the rail needs to cross the cable clamps of the suspension bridge cables, the cable clamps replace the rail saddles 2-1, and the pressure plate is connected to the rail saddles 2-1 to fix the shaped rail.

[0047] In another embodiment, the traveling frame 3-1 is provided with a traction connection point 3-4 for connecting with the traction rope of the winch. When the cable-mounted crane is traveling unloaded, the winch pulls the cable-mounted crane to travel along the track.

[0048] In another embodiment, such as Figures 5-6 As shown, it also includes a lubrication device, which consists of a flexible groove 5-1 and an oil outlet device; the flexible groove 5-1 is preferably made of flexible rubber, and the flexible groove 5-1 is detachably installed at the bottom of the tightening fiber rope 2-2, and its curvature is consistent with the curvature of the tightening fiber rope 2-2. The lower ends of the flexible groove 5-1 are sealed and the upper ends are open. The length of the flexible groove 5-1 does not exceed 1 / 2 of the circumference of the main cable 7.

[0049] The oil outlet device includes a rebound sponge 5-2 that absorbs lubricating oil and an oil outlet power component; rectangular through holes are symmetrically opened on the saddle 2-1, and the sponge 5-2 is installed in the through holes; the oil outlet power component includes a base 5-3, a pressing linkage rod 5-4, and an electric push rod 5-5. The base 5-3 is fixed on the saddle 2-1, and the pressing linkage rod 5-4 is fixed circumferentially by the base 5-3. The pressing linkage rod 5-4 can move up and down, and the bottom shape of the pressing linkage rod 5-4 is the same as the top shape of the sponge 5-2; an electric push rod 5-5 is installed on the traveling frame 3-1. When the traveling frame 3-1 moves onto the pressing linkage rod 5-4, the electric push rod 5-5 can push the pressing linkage rod 5-4 downward. The bottom of the electric push rod 5-5 is similar to a flat plate structure, which can reduce the positioning accuracy of the electric push rod 5-5. This ensures that during the movement of the walking frame 3-1, the electric push rod 5-5 can push the compression linkage rod 5-4 on each flexible cable clamp 2. The compression linkage rod 5-4 squeezes out the lubricating oil in the sponge 5-2. The lubricating oil flows down the wall of the main cable 7. The flexible groove 5-1 is located directly below the sponge 5-2. Finally, the lubricating oil enters the flexible groove 5-1, ensuring that the main cable 7 and the tightening fiber rope 2-2 at the bottom are immersed in the lubricating oil, reducing the friction between the tightening fiber rope 2-2 and the main cable 7, and improving their service life.

[0050] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and embodiments shown and described herein.

Claims

1. A load-bearing self-propelled cable-mounted crane, characterized in that, Includes light rails and running gear; The lightweight track includes several track segments and several flexible cable clamps, with the track segments laid directly above the main cable of the suspension bridge. Flexible cable clamps are used to secure the segmental track to the main cable; The walking device is located above the segmented track and can walk along the segmented track; A lubrication device includes a flexible groove and an oil outlet device; the flexible groove is detachably installed at the bottom of the tightening fiber rope, and its curvature is consistent with the curvature of the tightening fiber rope; the lower ends of the flexible groove are sealed. The oil dispensing device includes a sponge that absorbs lubricating oil and an oil dispensing power component. A through hole is provided on the saddle, and the sponge is installed in the through hole. The oil dispensing power component includes a base, a pressing linkage rod, and an electric push rod. The base is fixed to the saddle, and the pressing linkage rod is circumferentially fixed by the base. The pressing linkage rod can move up and down, and the bottom shape of the pressing linkage rod is the same as the top shape of the sponge. An electric push rod is installed on the traveling frame. When the traveling frame moves above the pressing linkage rod, the electric push rod can push the pressing linkage rod downwards. The pressing linkage rod squeezes out the lubricating oil from the sponge. The lubricating oil flows downwards along the wall of the main cable, and the flexible groove is located directly below the sponge. Finally, the lubricating oil enters the flexible groove, ensuring that the main cable and the tightening fiber rope at the bottom are immersed in the lubricating oil, reducing friction between the tightening fiber rope and the main cable.

2. The self-propelled cable-mounted crane as described in claim 1, characterized in that, Adjacent track segments are connected and extended by hinges using pins.

3. The load-bearing self-propelled cable crane as described in claim 1 or 2, characterized in that, The flexible cable clamp includes a saddle and a tightening fiber rope; The upper end of the saddle is provided with a slot for placing and fixing the segmented track along its length. The tightening fiber rope is wrapped around the main cable to tightly limit and fix the saddle to the main cable, and the two ends of the tightening fiber rope are fixed to the saddle.

4. The self-propelled cable-mounted crane as described in claim 1, characterized in that, The traveling device includes a traveling frame, a roller assembly, and a connecting shaft connecting the traveling frame and the roller assembly; the roller assembly can rotate relative to the traveling frame around the connecting shaft.

5. The self-propelled cable-mounted crane as described in claim 4, characterized in that, When there are multiple roller groups, the roller groups are hinged together by connecting rods.

6. The load-bearing self-propelled cable crane as described in claim 4 or 5, characterized in that, The traveling device is equipped with load power cylinders at both ends. The load power cylinders include cylinders and electric rail clamps. The cylinders are arranged above the track, with one end hinged to the traveling frame and the other end fixed to the segment track through the rail clamps.

7. The self-propelled cable-mounted crane as described in claim 1, characterized in that, The flexible cable clamps are arranged at equal intervals along the entire length of the main cable, and flexible cable clamps are also installed at the joints of two track segments.

8. The self-propelled cable-mounted crane as described in claim 4, characterized in that, The traveling frame is equipped with a traction connection point.

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